Philadelphia Keystones ERA Charts and Records
About ERA
Earned run average (ERA) is a metric that shows how many earned runs on average, a pitcher or team's pitcher, gives up over the course of nine innings. It is calculated by dividing earned runs by innings pitched then multiplying the result by 9. Generally, for ERA, lower is better. (Source)
Top Philadelphia Keystones Players by ERA
Which Philadelphia Keystones players rank highest in ERA? Below are the top ten by single season and by career totals with the team, requiring at least 50 innings pitched for a season record, or 100 innings pitched for a career record with the team.
Philadelphia Keystones ERA Per Season
Philadelphia Keystones's ERA for each season of their history, plotted alongside yearly averages for MLB, the Union Association, and the Union Association.
Philadelphia Keystones ERA Season Distribution vs. MLB and Peers
Each box summarizes ERA across all seasons, comparing the Philadelphia Keystones to MLB as a whole, the Union Association, and the Union Association. The box covers the middle 50% of seasons, the center line is the median, and the whiskers extend to the min and max values.
Philadelphia Keystones ERA Year-Over-Year Change
A waterfall chart showing how the Philadelphia Keystones's ERA shifted season over season. Each bar represents the change from the previous year, making it easy to spot peak and decline phases.
Philadelphia Keystones ERA — Season-by-Season Breakdown
Every season of Philadelphia Keystones's history with ERA alongside yearly averages for MLB, the Union Association, and the Union Association. Career totals include sum, average, minimum, maximum, and median.